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i'm trying to ping mail.example.com but failed. base on my below zone configuration.

Did I configure anything wrong?

$TTL 604800 ; 1 week
@   IN  SOA serverad.example.com.   root.example.com. (
                232       ; serial
                604800     ; refresh (1 week)
                86400      ; retry (1 day)
                2419200    ; expire (4 weeks)
                604800     ; minimum (1 week)
                )
IN  NS  serverad.example.com.
serverad        IN      A   172.17.5.121
121     IN  PTR serverad.example.com.

mail    IN  A   172.17.5.22
22      IN  PTR mail.example.com.
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    Your PTR records don't belong in your forward zone; you should have a separate reverse zone for those. Could you clarify what you mean when you say the ping doesn't work? Does the name resolution fail, or does the name resolve to the IP and the ping results in no reply?
    – briantist
    Aug 10 '14 at 4:00
  • actually i wan to ping "mail.example.com" but it said unknown host. Aug 10 '14 at 4:06
  • i thought it should reply 172.17.5.22. i'm just started to learn dns zone. but, according to tutorial. should work. Aug 10 '14 at 4:07
  • Where are you pinging from? Does that machine use the BIND server as a DNS server?
    – briantist
    Aug 10 '14 at 4:10
  • ya. i'm using this bind server as DNS server. actually i tried on my local bind server, it reply the same error message. Aug 10 '14 at 4:12
0

i found out why, my zone has key in wrong,and my zone is already exist in samba4 dynamic create zone,i need to use samba-tool dns add or dns management tools in window

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